Lead Java Full Stack Developer Information Technology Washington, DC

ASSYST is seeking a highly experienced and motivated Lead Java Full Stack Developer to join our client's dynamic engineering team in Washington D.C.

The candidate shall lead a team of talented developers in designing, building, and deploying enterprise‑scale applications using a modern Java and Angular technology stack. The candidate will take complete ownership of the end‑to‑end project lifecycle, from architectural design to post‑release support, while mentoring the team and driving technical excellence. The ideal candidate is a hands‑on leader with a passion for building robust, scalable software and fostering a collaborative Agile environment.

• Team Leadership & Mentorship: Lead, guide, and mentor a team of 5-10+ software engineers, fostering a culture of technical excellence, collaboration, and continuous improvement.
• Technical Ownership: Drive the architectural design and hands‑on development of complex, scalable full‑stack applications using the Spring Boot and Angular frameworks.
• End-to-End Delivery: Own the entire software development lifecycle, including requirements analysis, solution design, development, testing, CI/CD, deployment, and monitoring.
• Agile Practice Leadership: Champion and actively participate in all Agile/Scrum ceremonies, facilitate the breakdown of epics into user stories, and collaborate closely with Product Owners and Scrum Masters to ensure sprint goals are met.
• Code Quality & Best Practices: Enforce software development best practices through rigorous code reviews, advocating for TDD/BDD, and maintaining high standards of code quality using tools like Sonar Qube.
• Stakeholder
  
  Collaboration:
  
  Serve as a key technical point of contact, effectively communicating with cross‑functional teams, stakeholders, and management to ensure alignment and manage project delivery under tight deadlines.

10+ years of professional software development experience.

Proven track record as a Technical Lead or Team Lead
, successfully delivering complex, enterprise‑grade applications.

• Deep expertise in Java (8/11/17) and the Spring Boot ecosystem (Spring MVC, Spring Data JPA, Spring Security).
• Strong, hands‑on experience designing and building RESTful APIs and microservices architecture
  .
• Proficiency with messaging systems like Kafka or RabbitMQ
  .
• In‑depth knowledge of scalability, performance tuning, and distributed systems.

• Proficiency in modern Angular (12+), Type Script, RxJS, and state management with NgRx.
• Demonstrated experience building modular, scalable, and responsive Single-Page Applications (SPAs).
• Strong understanding of UI/UX best practices and experience with modern component libraries.

• Advanced skills in RDBMS (Postgre
  
  SQL, Oracle, MySQL), including complex SQL and database optimization.
• Experience with ORM frameworks like Hibernate and JPA
  .
• Familiarity with No
  
  SQL databases (Mongo
  
  DB, Redis) for high-performance scenarios.

• Hands‑on experience implementing and managing CI/CD pipelines using Jenkins
  , Git Lab
  , Git Hub Actions
  , or Azure Dev Ops
  .
• Expertise in containerization with Docker and orchestration with Kubernetes
  .
• Practical experience with a major cloud platform (AWS, Azure, or GCP), including deployment, scaling, and monitoring.
• Familiarity with logging and monitoring stacks like ELK
  , Prometheus
  , Grafana
  , or Datadog
  .

• Strong advocate for Test‑Driven Development (TDD) and BDD methodologies
  .
• Proficient with unit/integration testing frameworks (JUnit, Mockito, Testcontainers) and frontend testing tools (Jasmine/Karma, Cypress).

ASSYST is an Equal Opportunity Employer. Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, age, disability, military status, national origin or any other characteristic protected under federal, state, or applicable local law